comScore, Inc. (NASDAQ: SCOR) has just released a report on Twitter’s explosive growth worldwide. The comScore study found that in June 2010, about 93 million Internet users visited Twitter.com. This is an overall increase of 109 percent over last year. Indonesia reported the highest number of users, with 20.8 percent of Internet users in Indonesia visiting Twitter.com in June of 2010, followed by Brazil and Venezuela. Venezuela’s growth fueled in large part by Venezuelan President Hugo Chavez’s decision to join Twitter in late April 2010. This just goes to show that if you do not have a Twitter social media account for you or your business, then you need to set one up right away.

In June 2010, about 93 million unique global users age 15 and older visited Twitter from a home or work location. This is an increase of 109 percent from last year of June 2010. Keep in mind that this data excludes usage of Twitter-based applications such as TweetDeck and Hoot Suite.

An analysis by comScore of the five major global regions revealed that Latin America experienced the strongest audience growth, surging 305 percent to 15.4 million users. Asia Pacific ranked as the second-fastest growing region, climbing 243 percent to 25.1 million visitors. The Middle-East Africa jumped 142 percent to 5 million visitors, while Europe soared 106 percent to 22.5 million visitors. North America, where Twitter has reached a higher maturity level than other regions, saw a growth of 22 percent to nearly 25 million visitors in June.

*Excludes visitation from public computers such as Internet cafes or access from mobile phones or PDAs.

Across the 41 individual countries currently reported by comScore, Indonesia at 20.8 percent had the highest proportion of its home and work Internet audience visiting Twitter.com. Brazil ranked second with 20.5 percent penetration, followed by Venezuela at 19.0 percent. With Venezuelan President Hugo Chavez joining Twitter in late April, Twitter.com penetration in the country spiked 4.8 percentage points in a few short months. The Netherlands (17.7 percent) and Japan (16.8 percent) rounded out the top five, while countries in Latin America and Asia Pacific represented many of the remaining top markets, including the Philippines (14.8 percent), Mexico (13.4 percent) and Singapore (13.3 percent).

*Excludes visitation from public computers such as Internet cafes or access from mobile phones or PDAs.

What’s interesting is that an analysis of Twitter usage via mobile for the six mobile markets currently reported by comScore (U.S., U.K., France, Germany, Spain and Italy) revealed that Twitter is gaining adoption among smartphone users. In the U.S., 8.3 percent of smartphone users (4.2 million people) accessed Twitter.com in a month via the browser on their mobile devices, outpacing each of the European markets. In Europe, 2.8 percent of smartphone users overall accessed Twitter.com (1.7 million users), with the U.K. experiencing the strongest penetration in the region at 5.8 percent, followed by Germany with 3.1 percent and France with 2.1 percent.

*Includes only mobile browser access to Twitter and does not include other Twitter-based mobile applications.

comScore says that “For applications such as Twitter that function as an instantaneous broadcast medium, the mobile device represents the ideal platform to engage with this content anytime and anyplace,” added Mr. Mudd. “The advanced web browsing features of smartphones enable this behavior, making it likely to accelerate as these devices gain continued adoption. While desktop-based Internet usage is still king, mobile web usage is surging on a global scale placing applications like Twitter at the forefront of that paradigm shift.”